10 pages. "A substantially greater fraction of Marketplace enrollees switched plans in 2016 when average premiums increased but benchmark premiums did not keep pace than if premiums did not change.... When average premiums increased but benchmark premiums increased by the same amount, the fraction of Marketplace enrollees that switched plans in 2016 increased by a small amount, consistent with the fact that only a small percentage of enrollees are not eligible for premium tax credits.... These results suggest that consumers primarily respond to net premiums, rather than to gross premiums, when making plan selections in 2016."  MORE >>